Home / 21,015.06-29,000.43-11,455.05

Finding the Fourth Proportional to 21,015.06, 29,000.43 and 11,455.05

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Solution

The fourth proportional to 21,015.06, 29,000.43 and 11,455.05 is: 15,807.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.06 : 29,000.43 = 11,455.05 : x
  2. Step 2: Convert to fraction form
    21,015.06/29,000.43 = 11,455.05/x
  3. Step 3: Cross multiply
    21,015.06x = 29,000.43 × 11,455.05
  4. Step 4: Simplify right side
    21,015.06x = 332,201,375.67
  5. Step 5: Solve for x
    x = 332,201,375.67/21,015.06
  6. Step 6: Final answer
    x = 15,807.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.